File-cutting machine



AUNITED STATES PATENT OFFICE.

WILLIAM HALLIWELL AND LEVI OSBORN, OF POUGHKEEPSIE, NEW YORK.

FILE-CUTTING MACHINE.

Specification of Letters Patent No. 17,928, dated August 4:, 1857.

To all whom t may concern Be it known that we, VILLIAM HALLI- WELL andLEVI OsBoRN, of the city of Poughkeepsie, county of Dutchess, and Stateof New York, have invented a new and useful Self-Adjusting Machine forCutting Files; and we do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawings, making a part of thisspecification7 in which- Figurel is a horizontal View. Figs. 2 and-3longitudinal elevations. Figs. 4 and 5 transverse elevations.

A is the bed of the machine; B a moving carriage sliding on A by meansof a screw therein as hereinafter described; C a lateral slidingcarriage regulated by the self-acting switch 0 o (Fig. 6) also hereafterdescribed upon which are placed the files (e e) required to be cut,these files being secured by means of the levers b b acting upon thecams a a and rack.

D is the frame of the machine-e the hammer the point inclining` to thefulcrum of the hammer shaft-f, a spring attached to the hammer tostrengthen the blow.

X is the chisel fixed in a moving socket on the' rock shaft W which rockshaft is acted upon by the lever W and eccentric lever j fixed on theshaft z' to which isapplied the motive power ;-L, an eccentric leverregulating the stroke of the hammer. Upon the shaft z' is also placedanother eccentric lever 1c which in connection with the lever m andspiral spring attached act upon the ratchet c-e .and the wheel r (Fig.4c) which is fixed on the end of the screw-for the purpose of movingforward the carriages B and C. The bar f is furnished with a rollerimmediately under the chisel socket which by means of the spiral springsattached to the bar is kept firmly on the files and holds them firmly onthe carriage eX- cept during the change motion of the carriages.

As les are much broader toward the middle than at the point the chiselwill necessarily require a heavier blow to make a uniform cutthroughout. To accomplish this object, we attach to the carriage B anincline plane J which acting on the lever z" (Fig. 2) causes the spur hon the shaft g to press against the base of the hammer spring f (Fig. 4)and consequently produces a heavier stroke of the hammer.

The carriage B moving forward carries with it the stops t (Fig. 3) andal (Fig. 2) until z5 coming in contact with one of the arms of thetumbler s (Fig. 3) causes the opposite point to press on and move overthe spring and draws with it the horizontal' bar u raises the other armof the tumbler which raises the perpendicular bar u which acting uponthe rock shaft V brings the gag a (Fig. 2) under the spur o of thehammer and prevents the hammer striking during the change motion of thecarriages-the horizontal bar u (Fig. 3) acting upon the crank and bar uFig. l, which is connected with the sliding clutch 79 on the shaft mmoves the clutch 79 into gear with the cog wheel n-and holds back theratchet c (Fig. t) while (the wheel n acting upon 0 motion having beencommunicated by means of the belt and pulleys) the carriages are beingbrought back-then the other stop t (Fig. 3) again coming in contact withthe tumbler draws back the horizontal bar u, ungears the wheel n-andleaves the ratchet e at liberty to perform its function. The hammerhowever yet remains tripped by reason of the long arm of the front stopt coming under a pin in the perpendicular bar u and thus the chisel doesnot commence cutting till the carriage has advanced far enough to drawthe arm of the stop from under the pin and permits the gag to drop andthe hammer to commence striking-the stops d (Fig. 2) act upon the leverC which acts upon the spring e and regulates the action of the bar androller under the chisel socketas when the back stop comes in contactwith C and moves it over the center the effect of the long spring isremoved the bar being raised by the spring on the rock shaft of thechisel (Fig. l) prevents the roller from falling down between the filesduring the backward motion of the carriage B and the sliding motion of Cthe backward motion of the carriage B causes the front stop al to adjustthe spring and brings the roller again to bear on the files.

Fig. 6, 0 0 represents the self acting switch which is placed on thesurface of the bed A. The object of the switch is to slide the carriageC to either side of B and thus bring a fresh pile under the chisel.

The operation is as follows: When the carriages advance either wing ofthe switch is acted upon by one of two pins which are fixed in thecarriage C and project through a small slidevin B and move the point ofthe switch to the opposite side. This motion is accomplished before thechange motion is communicated to the carriages. In the center of thesliding carriage C there is a pin which also projects through B by meansof another small slide and comes in contact with the side of the switchduring the change motion of the carriages, and advancing toward thebroad part of the switch WILLIAM HALLIVVELL. LEVI OSBORN.

Witnesses:

C. K. CoRLiss, C. A. McCoRD.

